Multi-path charge transport in organic single crystals: a effective strategy to realizing ultra-sensitive organic ultraviolet photodetectors

Multi-path charge transport in organic single crystals: a effective strategy to realizing ultra-sensitive organic ultraviolet photodetectors | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Multi-path charge transport in organic single crystals: a effective strategy to realizing ultra-sensitive organic ultraviolet photodetectors Lijun Zhang, Derui Zhu, Hongzhuo Wu, Zewei Li, Meiyang Yu, Jingwei Tao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8062468/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract Organic semiconductor materials enable simple fabrication and flexible device integration, making them attractive for next-generation UV organic photodetectors (UV-OPDs). However, the high-performance UV-OPDs remain scarce due to intrinsic material limitations: the high exciton binding energy ( E B ) hinders free charge generation, while poor carrier mobility causes signal loss. Herein, we propose a multi-path charge transport strategy based on the synergistic regulation of molecules and crystals by introducing a large π-conjugated central nucleus to construct a D-π-A-π-D molecular structure that increase the π-conjugation and enhance planarity, which effectively promotes the π-overlap area between molecules, design and synthesize a novel perylene derivative (PDEDDP). The PDEDBDP single crystal (SC) exhibits multi-path charge transport between molecules, resulting in a smaller E B and high mobility. Furthermore, the UV organic phototransistors (UV-OPTs) based on PDEDBDP SC achieve the highest photoresponsivity ( R ) up to 4.61 × 10 7 A W -1 , which is one of the remarkable UV-OPT performance. This strategy provides a new idea for developing high-performance UV-OPDs. Physical sciences/Optics and photonics/Optical materials and structures/Photonic crystals Physical sciences/Physics/Electronics, photonics and device physics/Photonic devices Full Text Additional Declarations There is no conflict of interest Supplementary Files Supplementaryinformation.pdf Supplemental Material Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: revise 13 Mar, 2026 Review # 3 received at journal 17 Dec, 2025 Review # 1 received at journal 09 Dec, 2025 Reviewer # 3 agreed at journal 04 Dec, 2025 Review # 2 received at journal 04 Dec, 2025 Reviewer # 2 agreed at journal 02 Dec, 2025 Reviewer # 1 agreed at journal 30 Nov, 2025 Reviewers invited by journal 30 Nov, 2025 Submission checks completed at journal 28 Nov, 2025 Editor assigned by journal 08 Nov, 2025 First submitted to journal 08 Nov, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8062468","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":553106696,"identity":"4c797ccc-a9fe-4509-80dc-ac8f06c1121a","order_by":0,"name":"Lijun 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